public class Text4 {
    public static void main(String[] args) {
        int number = 1;
        switch(number){
            case 1 -> System.out.println("一");
            case 2 -> System.out.println("二");
            case 3 -> System.out.println("三");
            default -> System.out.println("没有选项");
            //这种写法不会触发case穿透

    }
}

}

